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參數(shù)資料
| 型號(hào)： | DS5000FP-16 |
| 廠商： | DALLAS SEMICONDUCTOR |
| 元件分類： | Microcontroller |
| 英文描述： | 8-BIT, MROM, 16 MHz, MICROCONTROLLER, PQFP80 |
| 封裝： | QFP-80 |
| 文件頁數(shù)： | 20/22頁 |
| 文件大?。?/td> | 592K |
| 代理商： | DS5000FP-16 |
DS5000FP
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POWER MANAGEMENT
The DS5000FP monitors power to provide Power-fail Reset, early warning Power-fail Interrupt, and
switch-over to lithium backup. It uses the Lithium cell at VLI as a reference in determining the switch
points. These are called VPFW, VCCMIN, and VLI respectively. When VCC drops below VPFW, the DS5000FP
will perform an interrupt vector to location 2Bh if the power-fail warning was enabled. Full processor
operation continues regardless. When power falls further to VCCMIN, the DS5000FP invokes a reset state.
No further code execution will be performed unless power rises back above VCCMIN. CE1 , CE2 , R/ W go
to an inactive (logic 1) state. Any address lines that are high (due to encryption) will follow VCC, except
for BA14, which is lithium backed. VCC is still the power source at this time. When VCC drops further to
below VLI, internal circuitry will switch to the lithium cell for power. The majority of internal circuits will
be disabled and the remaining nonvolatile states will be retained. Any devices connected to VCCO will be
powered by the lithium cell at this time. VCCO will be at the lithium battery voltage less a diode drop.
This drop will vary depending on the load. Low leakage SRAMs should be used for this reason. When a
module is used, the lithium cell is selected by Dallas so absolute specifications are provided for the switch
thresholds. When using the DS5000FP, the user must select the appropriate battery. The following
formulas apply to the switch function.
VPFW = 1.45 * VLI
VCCMIN = 1.40 * VLI
VLI Switch = 1.0 * VLI
MEMORY MAP OF THE DS5000FP Figure 2
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DS5000T-32-16 | 8-BIT, 16 MHz, MICROCONTROLLER, DIP40 |
| DS5000T-8-16 | 8-BIT, 16 MHz, MICROCONTROLLER, DMA40 |
| DS5000T-8-8 | 8-BIT, 8 MHz, MICROCONTROLLER, PDIP40 |
| DS5000T-8-12 | 8-BIT, 12 MHz, MICROCONTROLLER, PDIP40 |
| DS5001FP-16 | 8-BIT, 16 MHz, MICROCONTROLLER, PQFP80 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS5000F-P16+ | 制造商:Maxim Integrated Products 功能描述:MICRO FLATPACK-16MHZ PB-FREE - Rail/Tube |
| DS5000FP-16+ | 功能描述:8位微控制器 -MCU Soft MCU Chip RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT |
| DS5000T | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:Soft Microcontroller Module |
| DS5000T/KIT | 功能描述:開發(fā)板和工具包 - 8051 RoHS:否 制造商:Silicon Labs 產(chǎn)品:Development Kits 工具用于評(píng)估:C8051F960, Si7005 核心: 接口類型:USB 工作電源電壓: |
| DS5000T0808 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller |
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